MHT CET 2025 Physics question

PhysicsMotion in a PlaneMHT CET 2025

The resultant of two vectors and is . If the magnitude of is doubled, the new resultant vector becomes perpendicular to , then the magnitude of is

Answer: (C)

Solution

Let the angle between and be . The new resultant is perpendicular to , so \vec\vec\vec$ A=0⇒

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Question ID VK-100536